JPH11218185A - Vibration isolating mount - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve durability without causing a lowering of productivity. SOLUTION: Rubber elastic bodies 2, 2 are fastened protruding to the mutually opposed side from upper and lower parts 111, 112 intersecting a vertical axis X of an endless annular plate-like spring ring 11 opened in a longitudinal direction, and the respective rubber elastic bodies are connected to a vibration generating source or a vibration receiving part through fitting holes 3, 3 piercing the respective rubber elastic bodies longitudinally. The wall thickness of specific parts such as the upper part 111, the lower part 112, a left side part 113 and a right side part 114, upon which large bending load acts in the case of vertical vibration being inputted to the plate-like spring ring through both fitting holes 3, 3 is made thicker than the wall thickness of intermediate parts 115, 116, 117, 118 to increase cross-sectional area, thus uniforming bending stress generated to the spring ring, over the whole circumference. The cross-sectional area can be increased by increasing width dimension or combining the increase of wall thickness with the increase of width dimension. Boundary parts (weak point parts) near both end parts of the rubber elastic bodies where the cross section of the spring ring including the rubber elastic bodies abruptly changes, can be made specific parts to increase the cross-sectional area.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is applied to an engine mount of a vehicle, a hanger rubber for suspending and supporting a vehicle part, and the like, and relates to an anti-vibration mount using a plate-shaped spring body.

[0002]

2. Description of the Related Art Conventionally, a block-shaped rubber elastic body protruding in opposite directions from both positions separated from a main vibration input direction of an elliptical plate-shaped spring ring as this type of vibration-proof mount is conventionally used. There is known a structure in which a shaft body is fixedly attached to a spring ring, and is connected to a vibration generating source or a vibration receiving portion by inserting a shaft body into a mounting hole penetrating each rubber elastic body (Japanese Patent Laid-Open No. Hei 8 (1994)). -4816). In this device, as the above-mentioned spring ring, a band-shaped spring steel is used, and the spring steel is bent and connected at both ends by welding or riveting to form an endless ring.

[0003] Further, as another anti-vibration mount, there has been known an anti-vibration mount including an elliptical band-shaped spring ring and a mounting member for connecting the spring ring to a vibration source and a vibration receiving portion (particularly). See JP-A-2-46331). In this device, as the above-mentioned spring ring, a sufficiently long fiber is wound many times along the ring, and the endless annular fiber wound bundle is solidified with an adhesive or the like to increase the strength, and , As the mounting member,
The spring ring is composed of a pair of connecting pieces sandwiching the upper and lower positions of the spring ring from both upper and lower surfaces, and a bolt integrally formed to project from the connecting piece.

[0004]

However, in the conventional anti-vibration mount using the endless plate-shaped spring ring, the spring ring receives a vibration input from, for example, a vertical direction, so that the spring ring has a substantially alternating bending load. Will work repeatedly. At this time, if the spring ring has a circular or elliptical shape, peaks of bending stress are repeatedly applied particularly to each of the left and right sides thereof, which is a factor of reducing durability. Further, when the spring ring is formed by bending and joining endless spring steel as described above, stress concentration occurs at the connection portion, resulting in a decrease in durability.
Further, when the connection with the vibration generating source and the vibration receiving portion is performed via a block-shaped rubber elastic body formed integrally with the plate-shaped spring ring, the spring ring near both ends of the block of the rubber elastic body is formed. The peak of the bending stress acts repeatedly as a weak point, and as a result, the durability is also reduced.

[0005] It is conceivable to cope with such a factor of deterioration in durability by strengthening the fiber bundle as described above. However, in this case, the production is troublesome and the productivity is lowered.

The present invention has been made in view of such circumstances, and a purpose thereof is to improve the durability. In addition, the improvement of the durability is required to reduce the productivity. It is to realize without inviting.

[0007]

In order to achieve the above object, the invention according to claim 1 is formed in a bent or curved shape so as to exhibit a spring characteristic with respect to vibration input in the main vibration input direction. A protection comprising: a plate-shaped spring body; and two mounting portions integrally disposed with respect to the plate-shaped spring body at both positions separated from each other in the main vibration input direction and connected to a vibration source and a vibration receiving portion. Assuming that the vibration mount is used, the cross-sectional area of the plate-shaped spring body is set to be equal to that of the plate-shaped spring body so that the bending stress generated by receiving the vibration input in the main vibration input direction becomes substantially uniform along the entire length of the plate-shaped spring body. In this configuration, the spring body is continuously changed along the bent or curved shape.

In the case of the above construction, the bending stress generated even when the cross-sectional area is continuously changed along the bent or curved shape of the plate-shaped spring body and a vibration input is received is applied to the entire length of the plate-shaped spring body. Therefore, even if a repeated vibration input is received, there is no settling over a long period of time and the durability is improved. That is, in a portion where a large bending load is applied as compared with the other portion, the cross-sectional area is greatly changed, and the generated bending stress is made almost the same as in other portions, and the cross-sectional area changes continuously. As a result, the bending stress can be reliably made uniform along the entire length of the leaf spring. When the plate-shaped spring body is curved, for example, in an endless elliptical or circular shape, a large bending load is applied to each part located in the main vibration input direction and a direction orthogonal to this in comparison with other parts. Therefore, the cross-sectional area of each of the above-mentioned portions is changed more than the other portions.

According to a second aspect of the present invention, in the first aspect of the present invention, a pair of block-like rubber elastic bodies are provided so as to protrude from the spring surfaces of the plate-like spring bodies at respective positions corresponding to the two mounting portions. And at least one of the two mounting portions is formed by a mounting hole through which the shaft on the vibration source side or the vibration receiving portion side is inserted through the rubber elastic body. Things.

In the case of the above construction, a plate member with bolts and a special mounting member for connecting to the vibration generating source or the vibration receiving portion are not required, so that the mounting portion of the vibration isolating mount using the plate-like spring body is not required. The configuration is simplified.
Further, a rubber elastic body having the mounting hole is interposed between the vibration generating source and the vibration receiving portion. Even in this case, relative displacement between the vibration source and the vibration receiving portion is possible. Since the block-shaped rubber elastic body is fixed to the plate-shaped spring body so as to protrude from the spring surface, a boundary region between both ends of the rubber elastic body and the plate-shaped spring is a weak point portion. For this reason, the cross-sectional area of such a weak point portion is changed so as to be larger than the other portions, whereby the bending stress is made uniform along the entire length of the plate-shaped spring body.

According to a third aspect of the present invention, the plate-like spring body according to the first or second aspect of the present invention is formed in an endless annular shape using a synthetic resin, and is mainly provided at each portion along the plate-like spring body. The configuration is such that the cross-sectional area of a specific portion where the bending load applied by the vibration input in the vibration input direction becomes large is larger than the cross-sectional areas of other portions.

In the above configuration, since the leaf spring body is formed of synthetic resin, even if the leaf spring body has a cross-sectional area that varies along the entire length, it is formed using spring steel. In this case, the production can be performed very easily as compared with the case where the method is performed, and the productivity is improved. Moreover, even if the leaf spring body is an endless annular body, it is possible to easily manufacture a leaf spring body in a state where there is no seam by welding or riveting. And since the cross-sectional area of the specific part where the bending load becomes large is made larger than the other parts, the generated bending stress is surely uniformed along the entire length of the leaf spring body. Become.

According to a fourth aspect of the present invention, one or both of the thickness and the width of the specific portion in the third aspect of the invention is larger than the other portions. .

In the case of the above configuration, a method of increasing the cross-sectional area at a specific portion is specifically specified. That is, the thickness is increased in a state where the width is the same as other parts, the width is increased in a state where the thickness is equal to the other parts, or
By making both the wall thickness and the width larger than other parts, the cross-sectional area is increased. In any case, if the plate-like spring body is formed of a synthetic resin, it can be easily formed.

[0015] Further, the invention according to claim 5 is based on claim 3.
The plate-like spring body according to the invention described above has a structure in which short fibers or long fibers are integrally embedded in a state oriented in the circumferential direction.

In the case of the above construction, when the leaf spring body is formed of synthetic resin, short fibers or long fibers are integrally molded inside the leaf spring body while being oriented in the circumferential direction. The strength against bending can be increased, and the thickness of the leaf spring body can be reduced as a whole. In addition, the above fibers can be mixed into a molten material of synthetic resin, and the molten material can be easily oriented in the circumferential direction by injecting the molten material in the circumferential direction of the plate-shaped spring body. The plate-shaped spring body can be enhanced without lowering the performance.

[0017]

Embodiments of the present invention will be described below with reference to the drawings.

<First Embodiment> FIGS. 1 and 2 show an anti-vibration mount according to a first embodiment of the present invention. In FIG. 1, reference numeral 11 denotes both openings in a substantially horizontal direction (perpendicular to the plane of FIG. 1). (Hereinafter, referred to as the front-back direction), and a cylindrical spring ring as a plate-like spring body arranged so as to exhibit a spring characteristic in the vertical direction which is the main vibration input direction. A pair of block-like rubber elastic bodies protruding from the inner surfaces of the upper and lower parts so as to face each other in the vertical direction;
Reference numeral 3 denotes a pair of mounting holes penetrating each rubber elastic body 2 in the front-rear direction, and 4a is provided in a state of being in close contact with the inner peripheral surface of the spring ring 1 continuously from the rubber elastic bodies 2 and 2. It is a rubber coating layer.

The spring ring 11 is a plate-shaped spring formed by integral molding using a synthetic resin so that the cross-sectional shape becomes an ellipse or an ellipse. The spring ring 11 has the same width (dimensions in the front-rear direction) over the entire circumference, while the thickness of the spring ring 11 varies depending on each part in the circumferential direction, and the bending load is changed in other parts. The thickness is set so as to increase the thickness of the specific portion which is larger than that of. Specifically, the specific portions of the portions 111 and 112 (see FIG. 1) on both sides in the vertical direction, which is the main vibration input direction, and the portions 113 and 114 on both sides in the left and right direction are thick. Intermediate part 11 between the above upper part 111, lower part 112, left part 113 and right part 114
5, 116, 117 and 118 are thin. In addition, each of the above specific portions 111, 112, 113, 114
Between the intermediate portions 115, 116, 117, and 118, so that the wall thickness changes continuously, that is, gradually increases or decreases so that no sudden change in the cross-sectional area occurs. I have.

In order to form the spring ring 11 from a synthetic resin, it is preferable to use a fiber reinforced plastic (FRP) from the viewpoints of strength and thickness reduction.
Using short fibers or long fibers, these fibers 119, 119,
Are preferably uniformly embedded in the state in which the spring ring 11 is oriented in the circumferential direction (see FIG. 2), from the viewpoint of exhibiting the above-described vertical spring characteristics.

The synthetic resin used for forming the spring ring 11 may be generally a thermosetting resin. From the viewpoint of heat resistance and strength, for example, polyamide imide, polyimide, polyether ether ketone (PEEK) ) May be used. Further, as the fiber to be mixed, glass fiber, carbon fiber, aramid fiber, or the like may be used. In order to make these fibers oriented in the circumferential direction, for example, in injection molding, the molten resin containing the fibers may be injected in the orientation.

Each of the rubber elastic body 2 and the rubber coating layer 4a and the spring ring 11 are integrally vulcanized by inserting the spring ring 11 into a molding die, and are vulcanized or bonded through an adhesive. They are fixed in close contact with each other. Each of the rubber elastic bodies 2 has a trapezoidal cross-sectional shape from the inner surface of the upper and lower portions at a position where the rubber elastic body 2 intersects the vertical axis X which is the axis of symmetry of the spring ring 1 in the left-right direction. It is formed so as to protrude.
The protrusion amount of each rubber elastic body 2 is set such that the opposing interval between the two rubber elastic bodies 2 limits the displacement on the side (compression side) of the spring ring 11 that approaches each other in the up-down direction to a predetermined regulation dimension, Each of the rubber elastic bodies 2 serves as a compression-side stopper that limits the compression-side displacement of the spring ring 11 to a predetermined value in addition to the role described below.

Each of the mounting holes 3 penetrates the rubber elastic body 2 in a direction perpendicular to the axis X (front-back direction) at upper and lower positions separated from each other along the axis X. Is formed to have substantially the same outer diameter as a shaft body (not shown) (for example, a shaft portion of a mounting bolt) used for attachment to the vibration source side or the vibration receiving portion side. These two mounting holes 3 constitute three mounting portions for connection to a vibration source or a vibration receiving portion. Then, vibration is mainly input in the vertical direction from each of the mounting holes 3, and the spring ring 1 is bent toward the side (the above-described compression side) or the side farther away (the tension side) between the mounting holes 3 and 3 in the vertical direction. And relative displacement.

Each rubber elastic body 2 is elastically deformed with respect to the spring ring 1 with respect to the vibration input from each of the mounting holes 3 in the left-right direction to allow relative displacement in the left-right direction. The rigidity (elastic coefficient) in the left-right direction is set so as to attenuate the directional vibration. Therefore, each of the elastic bodies 2 has a role of forming a mounting portion (mounting hole 3) for a vibration source or a vibration receiving portion, a role of enabling the relative displacement in the left-right direction, and a role of the compression-side stopper. Respectively.

Further, the rubber elastic bodies 2 and 2 and the rubber coating layer 4a are formed using natural rubber or synthetic rubber, and are made of synthetic rubber having heat resistance, for example, ethylene propylene rubber (EPDM). It is preferable from the viewpoint of improving the heat resistance of the ring 11.

When the anti-vibration mount configured as described above is used, for example, as an engine mount of an automobile, a shaft body inserted into, for example, the upper mounting hole 3 of the two mounting holes 3, 3 serves as a vibration source. Installed on the engine side,
It is mounted on the vehicle body side as a vibration receiving part by a shaft inserted through the lower mounting hole 3. As a result, vibrations on the engine side or the vehicle body side, which are input in the vertical direction from the upper or lower mounting hole 3, are damped by the vibration damping characteristics having a low static-dynamic ratio based mainly on the spring characteristics of the spring ring 11.

At this time, a repetitive bending load is applied to the spring ring 11 in response to the input vibration in the vertical direction, but the specific portion to which a particularly large bending load is applied compared to other portions. 111, 112, 113, 1
Since the cross-sectional area of the spring ring 11 is made larger than that of the other portions, the bending stress generated over the entire circumference of the spring ring 11 is made uniform. For this reason,
The durability can be improved by preventing the occurrence of fatigue, sagging, and the like, and the predetermined anti-vibration characteristics can be reliably exhibited for a long period of time. Moreover, the spring ring 11 capable of improving the durability is made of synthetic resin,
In addition, since it is formed by integral molding of a synthetic resin in which reinforcing fibers are embedded, its manufacture is extremely easy, and it is possible to greatly improve productivity as compared with a case where a spring ring is formed using spring steel. become.

Further, the damping characteristic of the rubber coating layer 4a is added to the spring characteristic of the spring ring 11 itself, and the vibration can be damped by the vibration damping characteristic in consideration of the damping characteristic. The desired characteristics can be obtained by adjusting the thickness and the like of the rubber coating layer.

Further, when vibration in the left and right direction is input from the upper or lower mounting hole 3, each rubber elastic body 2 is elastically deformed, so that each mounting hole 3 and the spring ring 1 are moved in the left and right direction. Displacement becomes possible, and it is possible to achieve damping for the vibration in the left-right direction. Therefore, separately from the vertical vibration-proof characteristics by the spring ring 11, the horizontal vibration-proof characteristics can be set independently of each other.

In addition, a mounting portion for a vibration source or a vibration receiving portion is provided with mounting holes 3
3, a bolted plate material or a special mounting member as a mounting portion required in a conventional anti-vibration mount using a spring ring can be omitted. The configuration of the mounting portion in the swing mount can be simplified. In addition, since each of the rubber elastic bodies 2 is configured to also function as a compression-side stopper, further simplification can be achieved by forming the mounting holes 3 and 3 in each of the rubber elastic bodies 2. Can be achieved.

The above operation and effect have been described in connection with the case where the anti-vibration mount is used as an engine mount. In addition to this, the anti-vibration mount is supported by, for example, suspending an exhaust pipe of an automobile from a vehicle body. It can be used also as a hanger rubber, and the same operation and effect as above can be obtained. Even when only one use of the engine mount or the hanger rubber is described in each of the following embodiments, it can be used for the other use similarly to the above, and the same operation and effect can be obtained.

<Another Embodiment of First Embodiment; Part 1> FIG.
Shows another embodiment of the first embodiment, 5 is a tubular body embedded in the rubber elastic body 2 on the upper side to form a mounting hole 3 as one (upper) mounting portion, and 6 is the other. A mounting bolt as a (lower) mounting portion. That is, the mounting hole 3 as the mounting portion may be formed by simply forming a through hole in each rubber elastic body 2 as shown in FIG. 1, or as shown by a dashed line in this embodiment of FIG. 3 or FIG. As described above, this may be performed by embedding the cylindrical body 5 in the rubber elastic body 2, or any method may be used. In addition, the formation of the mounting portion by the mounting hole 3 may be performed for only one of the pair of rubber elastic bodies 2. Even in this case, on one side, the operation and effects such as the simplification of the configuration of the attachment portion in the first embodiment and the possibility of lateral displacement can be obtained.

The mounting bolt 6 has a head disposed on the inner surface side of the spring ring 11 and a shaft portion disposed so as to pass through the spring ring 1.
Is integrated with the spring ring 11 by being embedded in the rubber elastic body 2 and vulcanized and bonded.

<Second Embodiment> FIG. 4 shows a second embodiment, in which reference numeral 12 denotes a leaf spring having a C-shaped cross section. That is, even if the plate-shaped spring body of the present invention is not an endless ring as shown in FIG. 1, it is not affected by the vibration input to the two free ends 121, 121 as shown in FIG. 4. This shows that a member formed into a curved shape so as to exhibit spring characteristics may be used. FIG.
In the drawings, reference numeral 2 denotes a block-shaped rubber elastic body, and reference numeral 3 denotes a mounting hole, both of which have the same configuration as in the first embodiment, and a detailed description thereof will be omitted.

In this case, the spring ring 12 has the same width (dimension in a direction perpendicular to the plane of FIG. 4) over the entire circumference, and the two free ends 121 through the mounting holes 3. , 121 are set such that when a vibration is input in the up-down direction, the wall thickness of a specific portion on which a larger bending load acts than other portions becomes larger than that of the other portions. Specifically, in the cross-sectional direction, the boundary portions 122, 122 where the inner ends of the block-shaped rubber elastic bodies 2, 2 are located.
While the specific portion of the central portion 123 is made thicker,
The free end side portions 124, 124 on both sides in the vertical direction (direction along the vertical axis X) which is the main vibration input direction, and the intermediate portions 125, 125 between the boundary portions 122, 122 and the central portion 123 are thin. Have been. In addition, the thickness between the specific portions 122 and 123 and the intermediate portion 125 changes continuously, that is, gradually increases or decreases, so that no sudden change in the cross-sectional area occurs. It has been like that.

The spring ring 12 is also formed by integral molding of synthetic resin, preferably by integral molding of fiber reinforced plastic (FRP), as in the first embodiment. In this case, the orientation of short fibers or long fibers is set. Is preferably embedded uniformly in the circumferential direction of the spring ring 12 from the viewpoint of exhibiting spring characteristics against vibrations input to the free ends 121, 121.

The inner peripheral surface of the spring ring 12 is formed by the inner rubber coating layer 4a, and the outer peripheral surface is formed by the outer rubber coating layer 4b.
Respectively.

In the case of the second embodiment, the spring ring 12
Has a C-shaped cross section having free ends 121, 121, so that no excessive bending load acts on each free end side portion 124, and a spring ring including the rubber elastic body 2 is provided. A larger bending load acts on each of the boundary region 122 and the central region 123, which are the 12 suddenly changing sections, as compared with the other regions. For this reason, by increasing the thickness of each of the specific portions 122 and 123 where the large bending load is applied to have a large cross-sectional area, the bending stress generated over the entire length of the spring ring 12 can be made uniform. Can be. As a result, similarly to the first embodiment, it is possible to prevent the occurrence of fatigue, sagging, and the like, to improve durability, and to reliably exhibit a predetermined vibration-proof characteristic for a long period of time. . Moreover, since the spring ring 12 capable of improving the durability is formed by using synthetic resin and integrally formed with synthetic resin in which reinforcing fibers are embedded, the manufacturing thereof is extremely easy. The productivity can be greatly improved as compared with the case where a spring ring is formed using the spring ring.

It should be noted that the vibration characteristics of the spring ring 12 itself can be obtained by taking into account the damping characteristics of the rubber coating layers 4a and 4b in addition to the spring characteristics of the spring ring 12 itself. The fact that the vibration damping properties in the left and right directions can be set independently of each other in addition to the vibration damping properties in the vertical direction by being performed via the rubber elastic body 2, and a mounting hole penetrating each rubber elastic body 2 The point that the configuration of the mounting portion can be simplified due to the configuration of the mounting portion by 3 and 3 can be obtained similarly to the first embodiment.

<Third Embodiment> FIGS. 5 and 6 show a third embodiment. Reference numeral 13 denotes a spring ring as a plate-like spring body having an elliptical or circular cross section. This third
In the embodiment, the cross-sectional area of the specific portion is increased by increasing the width dimension. 5 and 6, 2
Is a block-like rubber elastic body, 3 is a mounting hole, and 4a is a rubber coating layer. Since these have the same configuration as the first embodiment, detailed description thereof is omitted.

The thickness of the spring ring 13 in this case is made uniform over the entire circumference, and both ends of the rubber elastic bodies 2 in the left-right direction (left-right direction in FIG. 5) in the cross section in FIG. Are set so that the width in the front-rear direction (dimension in the direction perpendicular to the paper surface of FIG. 5) of the located boundary portions 132, 132,... Is wider than the other portions. Specifically, the spring ring 13 includes a cylindrical body 131 having a uniform cross-sectional shape and an elliptical shape and a uniform thickness, and a front-rear direction over a predetermined range in the circumferential direction at each of the boundary portions 132 of the cylindrical body 131. Four pairs of protruding pieces 133, 133, 13 protruding on both sides
.. (See FIG. 6) are formed integrally with each other, and the width of each of the boundary portions 132 is made larger than that of the other circumferential portions by the pair of projecting pieces 133 and 133. The cross-sectional area is made large. That is,
In the third embodiment, when vibration is input to the spring ring 13, the cross-sectional shape changes suddenly in a cross section in which the rubber elastic body 2 and the spring ring 13 are added. It is intended to reduce the bending stress generated by increasing the cross-sectional area of each boundary portion 132. Thereby, the bending stress generated over the entire circumference of the spring ring 13 is made uniform. The width of both ends of each of the projections 133 is also gradually reduced or increased so that the width of the spring ring 13 does not suddenly change.

In the case of the third embodiment described above, without increasing or decreasing the thickness in the circumferential direction as in the first or second embodiment, the thickness can be increased by increasing the width dimension by each of the protrusions 133. The cross-sectional area can be increased in a state of uniformity, and as a result, the bending stress becomes uniform, and as a result, the occurrence of fatigue, settling, and the like occurs in the same manner as in the first or second embodiment. , And the durability can be improved, so that the predetermined anti-vibration characteristics can be reliably exhibited for a long period of time. Moreover, the spring ring 13 capable of improving the durability is made of synthetic resin, and
By forming it by integral molding with a synthetic resin in which reinforcing fibers are embedded, its manufacture is extremely facilitated, and the productivity can be greatly improved as compared with the case where a spring ring is formed using spring steel.

<Fourth Embodiment> FIG. 7 shows a fourth embodiment, in which reference numeral 14 denotes a spring ring as a plate-like spring body having an elliptical or circular cross section. In the fourth embodiment, both the increase in the wall thickness and the increase in the width are used as the increase in the cross-sectional area at a specific portion of the plate-shaped spring ring 14. In FIG. 7, reference numeral 2 denotes a block-like rubber elastic body, reference numeral 3 denotes a mounting hole, and reference numeral 4a denotes a rubber coating layer. Since these have the same configuration as in the first embodiment, detailed description thereof will be omitted.

In this case, the spring ring 14 is
41, the lower part 142, the left part 143, and the right part 144 are made thicker than the four boundary parts 145, while the four boundary parts 1 are made thinner.
The protruding pieces 146 are integrally protruded from the front and rear edges 45, respectively, and the width dimension of each boundary portion 145 is increased. That is, in the above-mentioned spring ring 14, upper and lower portions 141 and 142 separated in the vertical direction which is the main vibration input direction.
The left and right portions 143 and 144 separated in the left and right direction orthogonal to the main vibration input direction, and the four boundary portions 145 near both ends of the block-shaped rubber elastic bodies 2 and 2 are used for vibration input. At this time, specific portions on which a larger bending load acts than other portions are used, and the cross-sectional area of each specific portion is increased. Of course, the increase in the thickness or the increase in the width at each of the specific portions is gradually increased or decreased so that a sudden change in the cross-sectional area does not occur.

Also in the case of the fourth embodiment, as in any one of the first to third embodiments, even if the spring ring 14 is bent and deformed during vibration input, the spring ring 1
4 can be made uniform over the entire length in the circumferential direction, and similarly to the above-described first to third embodiments, fatigue and sagging can be prevented from occurring to improve durability. Therefore, it is possible to reliably exhibit a predetermined vibration-proof characteristic for a long period of time. In addition, the spring ring 14 that can improve the durability is made of synthetic resin, and is formed by integral molding of synthetic resin in which reinforcing fibers are embedded.
The productivity can be greatly improved as compared with the case where the spring ring is formed using spring steel.

[0046]

As described above, the anti-vibration mount according to the first aspect of the present invention does not cause sagging or fatigue even when subjected to repeated vibration input, and ensures the predetermined anti-vibration for a long period of time. Vibration performance can be exhibited, and durability can be improved.

According to the second aspect of the present invention, in addition to the effects of the first aspect, a plate member with bolts and a special mounting member for connecting to a vibration generating source or a vibration receiving portion are not required. In addition to simplifying the configuration of the mounting portion in the vibration isolating mount using the plate-like spring body, the above-mentioned vibration source and the vibration source can be moved in directions other than the main vibration input direction due to the elastic deformation of the rubber elastic body. The anti-vibration function with the receiving portion can be provided. And
Even when such a block-shaped rubber elastic body is fixed to a plate-shaped spring body, it is possible to prevent a boundary region between both ends of the rubber elastic body and the plate-shaped spring from becoming a weak point part. Thus, the bending stress can be made uniform over the entire length of the plate-shaped spring body.

According to the third aspect of the invention, in addition to the effects of the first or second aspect, the cross-sectional area varies along the entire length because the plate-like spring body is formed of synthetic resin. Even if the plate-like spring body as described above is used, and even if the plate-like spring body is an endless annular body, the manufacture thereof can be performed extremely easily without causing a decrease in productivity. become. And since the cross-sectional area of the specific portion where the bending load becomes large is made larger than that of the other portions, the generated bending stress can be surely made uniform along the entire length of the leaf spring body. become.

According to the fourth aspect of the present invention, it is possible to easily and reliably achieve an increase in the cross-sectional area of a specific portion where a large bending load is applied. According to this, when the plate-shaped spring body is formed of a synthetic resin, the strength of the plate-shaped spring body against bending can be greatly increased without lowering the productivity.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a first embodiment of the present invention.

FIG. 2 is a perspective view of the anti-vibration mount of FIG.

FIG. 3 is a view corresponding to FIG. 1, showing another embodiment of the first embodiment.

FIG. 4 is a view corresponding to FIG. 1, showing a second embodiment.

FIG. 5 is a view corresponding to FIG. 1, showing a third embodiment.

FIG. 6 is a perspective view of the anti-vibration mount of FIG. 5;

FIG. 7 is a view corresponding to FIG. 1 showing a fourth embodiment.

[Explanation of symbols]

2 Rubber elastic body 3 Mounting hole (mounting part) 6 Mounting bolt (mounting part) 11, 12, 13, 14 Spring ring (plate-like spring body) 111, 141 Upper part (specific part) 112, 142 Lower part (specific part) Parts) 113,143 Left part (specific part) 114,144 Right part (specific part) 115-118 Intermediate part (other parts) 119 Fiber 122,132,145 Boundary part (specific part) 123 Central part (specific part) 124 Free end side part (other part) 125 Intermediate part (other part)

Claims (5)

[Claims] 1. A plate-shaped spring body which is formed in a bent or curved shape so as to exhibit spring characteristics with respect to vibration input in a main vibration input direction, and said plates at both positions separated from each other in said main vibration input direction. A vibration-isolation mount having two mounting portions integrally provided with the vibration-source and a vibration-receiving portion, wherein the plate-like spring receives a vibration input in a main vibration input direction. Wherein the cross-sectional area is continuously changed along the bent or curved shape of the leaf spring body so that the bending stress generated by the leaf spring body becomes substantially uniform along the entire length of the leaf spring body. Anti-vibration mount. 2. A pair of block-like rubber elastic bodies fixed to the plate-like spring body so as to protrude from the spring surface of the plate-like spring body at respective positions corresponding to the two mounting portions. At least one of the two mounting portions is formed by a mounting hole through which the shaft body on the vibration source side or the vibration receiving portion side penetrates the rubber elastic body. And anti-vibration mount. 3. The plate-like spring body according to claim 1, wherein the plate-like spring body is formed in an endless annular shape by a synthetic resin,
In addition, the cross-sectional area of a specific portion where the bending load applied by the vibration input in the main vibration input direction is large in each portion along the plate-shaped spring body is formed to be larger than the cross-sectional areas of other portions. Anti-vibration mount. 4. The anti-vibration mount according to claim 3, wherein at least one of the thickness and the width of the specific portion is larger than the other portions. 5. The anti-vibration mount according to claim 3, wherein the plate-like spring body has a short fiber or a long fiber integrally embedded therein in a state oriented in a circumferential direction.